How do I write and sell an Ebook on a topic in which there safety
hazards (due to nature of topic) and make sure that I am not liable
for any injuries or damages that are a result of performing the
activities talked about in the ebook. What if information in the ebook
that is "less than perfect" or not 100% correct is partially to blame
for an injury? How do I make it so I am still not liable?

Wouldn't you want persons accessing the ebook to tick-off on a
disclaimer that says that they recognize the risks and will not hold
you responsible?
Probably with an email address and message?
BUT:  once the ebook is in their hands, I doubt if this would be
binding on anyone else  - someone that person passed the info on to,
or someone who was injured when that person had an accicdent with his
experiment.
And I suspect that in the States such a disclaimer might not be
sufficient to divest yourself of liability.
This is no legal or professional advice.  See the disclaimer below.